MV Heating Airo 5 Manual de instrucciones
MV Heating UK Ltd
Unit 6
Second Avenue Business Park
Millbrook
Southampton
SO15 0LP
MV Heating UK LTD
+44 (0)2380 522345
MV Airo 5
WORKSHOP MANUAL
ED 1.02
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MV Heating UK Ltd
Disclaimer:
This manual is intended to give an overview of the internal workings of MV
diesel heaters. As such, all work should be carried out by trained
professionals at their own discretion. Any action you take upon the
information in this manual is strictly at your own risk, and MV Heating will not
be liable for any losses and damages in connection with the use of this
information. Under no circumstances shall MV Heating or its affiliates,
suppliers, or installers be liable for any indirect, incidental, consequential,
special or exemplary damages, arising out of or in connection with these
manuals. We do not take any warranties about the completeness, reliability
and accuracy of this information. MV Heating assumes no responsibility or
liability for any errors or omissions from these manuals.
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MV Heating UK Ltd
Contents
Heater Removal .................................................................................................3
Heater Installation .........................................................................................3
Heater Cases Diagram........................................................................................4
Internal Structure Diagram ................................................................................5
E.C.U. Connections Diagram ..............................................................................6
Removing and Refitting of Parts ........................................................................7
Pre-Checks and Notes ....................................................................................7
Part 1: The Case Assembly.............................................................................8
Part 2: The Overheat Sensor..........................................................................9
Part 3: The E.C.U. .........................................................................................10
Part 4: The Air Motor ...................................................................................11
Part 5: The Burner and Glow Pin Assembly Removal ..................................12
Part 5 Cont’d: The Burner and Glow Pin Assembly Refit .........................13
Part 5 Cont’d: The Burner and Glow Pin Assembly Refit.........................14
Part 6: The Combustion Chamber................................................................15
Part Numbers...................................................................................................16
Notes................................................................................................................17
Note: The following flow charts will refer to the exploded diagrams, or figures
as (F:P), where ‘F’ donates the figure, and ‘P’ donates the part in that figure.
For example (2:4) would mean ‘Figure 2: Part 4’.
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MV Heating UK Ltd
Heater Removal
To remove the heater from its installation positions, follow these steps:
1. Disconnect the vehicle’s battery.
2. Disconnect any ducting secured to the heater’s inlet, or outlet caps.
3. Remove the ECU cover (1:3) from the top cover (1:4) to access the
main heater connection.
4. Disconnect main wiring harness connector from heater.
5. Disconnect the fuel supply line from heater’s fuel inlet.
6. Disconnect the fuel pump by pressing the spring clip down and pulling
away the connector.
7. Disconnect the combustion air intake and exhaust pipe from the
bottom of the heater.
8. Remove the four M6 nuts and washers from the base of the heater.
9. Remove the heater and discard the mounting gasket.
Heater Installation
To reinstall the heater back into position, follow these steps:
1. Locate heater into position with a new mounting gasket and secure
with the four M6 nuts and washers to 6 + 1 Nm.
2. Connect and secure fuel supply line to the heater’s fuel inlet.
3. Connect and secure the combustion air intake and exhaust pipe to the
heater.
4. Route the fuel cable to the fuel pump and reconnect it.
5. Connect the main wiring harness connector to the E.C.U. and replace
the cover (1:3).
6. Reconnect the vehicle’s battery.
7. Fully bleed the fuel supply system, by turning the heater on and off.
Ignition failure will occur until the system has been bled.
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MV Heating UK Ltd
Heater Cases Diagram
3
1
6
4
2
5
Figure 1
1. Inlet Cap 2. Outlet Cap 3. E.C.U. Cover
4. Top Cover 5. Bottom Cover 6. Grill
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MV Heating UK Ltd
Internal Structure Diagram
Figure 2
1. Overheat Sensor 2. E.C.U. 3. Air Motor Assembly
4. Air Motor Gasket 5. Burner 6. Glow Pin (& Flame Sensor)
7. Combustion Chamber 8. ‘O’ Ring 9. Heat Exchanger
10. Insulating Bush
2
67
5
4
31
9
8
10
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MV Heating UK Ltd
E.C.U. Connections Diagram
1
2
7
65
43
Figure 3
1. Overheat Sensor 2. Glow Pin 3. Fuel Pump
4. Temperature Sensor 5. Main Wiring Harness 6. Empty
7. Air Motor
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MV Heating UK Ltd
Removing and Refitting of Parts
Pre-Checks and Notes
•All gaskets located between the disassembled parts must always be
discarded and replaced.
•All the parts that have been disassembled should be cleaned with
appropriate cleaning fluid and blown dry with pressurized air.
•Any sealing compound on parts must be carefully and completely
removed before attempting to refit.
•All disassembled parts should be Inspected for damage (cracks,
distortion, wear, etc.) and replaced as required.
You should also regularly inspect all electrical connectors and wiring for
corrosion, loose contacts, or wrong crimping, etc. and repair as required.
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MV Heating UK Ltd
Part 1: The Case Assembly
Tools:
•1 x Small Flat-Bladed Screwdriver
Removing the Cases:
1) Remove the heater from its installation position.
2) Remove the inlet cap (1:1) with grill (1:6) (if attached) using a screwdriver
to separate from bottom and top cases.
3) Remove the outlet cap (1:2) the same way, making sure it doesn’t catch
on the heat exchanger.
4) Remove the E.C.U. cover (1:3) and top case (1:2) together by sliding away
from the bottom case.
5) Remove the bottom (1:5) case by pulling away from air motor lugs first.
Refitting the Cases:
1) Ensure all four rubber insulating bushes (2:9) are located on the tabs of
the heat exchanger (2:8) first before refitting the cases.
2) Replace bottom case (1:5), ensuring the air motor lugs sit inside the
appropriate holes.
3) Replace top case (1:4), ensuring that the tabs are locate inside the
bottom case correctly.
4) Refit the outlet cap (1:2), ensuring that it is orientated correctly.
5) Refit the inlet cap (1:1), ensuring that it is orientated correctly.
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MV Heating UK Ltd
Part 2: The Overheat Sensor
Tools:
•1 x Small Flat-Bladed Screwdriver
Removing the Overheat Sensor:
1) Remove the cases (Part 1).
2) Unplug the overheat sensor (2:1) from the E.C.U. (two blue wires).
3) Slide the overheat sensor off the heat exchanger (2:9). It can be a tight fit,
and a small flat-bladed screwdriver can be used to ease it off as
necessary.
Refitting the Overheat Sensor:
1) Replace the overheat sensor onto the heat exchanger.
2) Plug the overheat sensor back into the E.C.U. (2:2), paying attention to its
correct orientation.
3) Replace the cases (Part 1).
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